Download The Work of Gregor Mendel - OG

Name _________________________________________________ Period____________
The Work of Gregor Mendel –
1. What is genetics?
2. Who was the founder of the field of genetics?
3. What were his three main professions?
Gregor Mendel and His Peas –
4. How did Mendel become interested in plants and how did this help him with his work as
a scientist?
5. Name the 7 traits (characteristics) of the pea plant that Mendel studied and the 2
contrasting traits for each:
Characteristic
a.
b.
c.
d.
e.
f.
g.
Contrasting Traits
6. How did Mendel end up with a stock of plants that were all identical to their parent plant?
7. What does “true breeding” mean?
8. What is the difference between self-pollination and cross-pollination?
9. Why did Mendel want to cross-pollinate his pure strains of pea plants?
10. How did Mendel prevent self-pollination when he wanted to cross-pollinate certain pea
plants?
11. What is a hybrid?
12. What did Mendel call the original pair of plants in a genetic cross? What did Mendel call
the offspring of that generation?
13. What is the difference between a gene and an allele? Give an example
14. Mendel came up with the Principle of Dominance. What does this principle tell us about
what traits we see (or don’t see) in any given organism?
15. Take a look at Figure 11-3 and write the results in the table below. The first is done for
you as an example.
Characteristic
P Cross
F1 Generation
_______ x _______
1. Seed shape
Round x Wrinkled
Round
2.
3.
4.
5.
6.
7.
Mendel’s Results & Conclusions16. When Mendel crossed a pure green pod plant with a pure yellow pod plant, what were the
results?
17. What happens when a trait controlled by a recessive allele is paired with a dominant
allele?
18. What do capital letters refer to, and what do lower case letters refer to?
19. Mendel crossed a tall plant (Tt) with another tall plant (Tt) and ended up with 75% tall
plants and 25% short plants. Why didn’t he end up with 100% tall plants?
20. Match the vocabulary term from the right to its correct description on the left
1. ____ Sex cells
A. Parental
2. ____ Different forms of a gene
B. Fertilization
3. ____ Heritable characteristics
C. Alleles
4. ____ Offspring of crosses between
parents of differing traits
D. Gametes
E. Traits
5. ____ Process in which 2 reproductive
cells join and a new cell develops
F. Genes
6. ____ Factors passed from parent to
offspring
H. Hybrid
G. First filial
I. Segregation
7. ____ P generation
8. ____ F1 generation
9. ____ Alleles separate during gamete formation